Valve-grinder



C. A. BUKOVE.

VALVE GRINDER.

APPLICATION FILED mac. 13, 1919.

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ATTORNEY.

UNITED STATES.

PATENT OFFICE.

ensues A. mixovn, or UTE rank, NEW MEXICO.

VALVE- amma.

Specification ofLectei-a Patent. Patented spt. 13, 1921,

Application filed December13, 1919. Serial at. 344,651.

Ute Park in the county of Colfax and tate of New Mexico, have invented new and useful Im rovements in Valve-Grinders, of which tiie following is a specification.

This invention relates to 'a multiple valve grinder, and the object is'to provide a dereseating operation.

A further object is to provide, in a device vice for grinding the valves of an internal combustion englne, and which shall include mechanlsm for rotating the several valves simultaneously, withdrawing them from their seats, and reseatin them, the valves being rotated during the interval priorto the of the'type indicated, a rack bar, and means for reciprocating the same, a plurality of spindles, each of the latter being designed to rotate one of the valves, the spindles carry-' ing gear wheels meshing with the rack bar, and means for elevating the spindles at intervals, in order thatthe valves may be withdrawn, partly rotated, and then reseated, for further grinding. 1

With the. foregoing and other objects in view, the invention consists in the novel construction, combination and arrangement of elements'hereinafter described and claimed. In the drawings, i t Figure 1 is a view of the mechanism, in

side elevation; Fig. 2 is an end elevation, and

F i 3. is a detail of the gearing.

' The mechanism herein described may be so varied that the required number of valves may be ground at. one time, but in the present instance I have shown a device designed for grinding simultaneously four valves. T e valves of an internal combustion engine are designated 10, these valves being enga ed, respectively, by spindle 11, the

- s in les being rotated constantly and being e evated at intervals, in the manner set fort below.

A rack bar '13 is suitably mounted for reciprocable-movement in the frame 14, and is engaged by the respective ar wheels 15 carried bythe spindles 11. e spindles also carry disks 16, enga ed by cams 17 on cam shafts 18, the latter avin fixed thereon a gear, wheel 19;]. Gear whee 19 meshes with gear wheel 20, h'aving formed thereon a beveled pinion 21 meshin with beveled pinion 22 rotated by the cran 23.

meshing with a" beveled pinion 30 on the short shaft 31" rigidly mounting gear wheel 32', the latter meshing with'gear Wheel 20.

By this construction the rack bar 13 is reciprocated constantly, while by reason of the continuous rotation of the cam shaft, the spindles 11 are elevated and the valves being ground are likewise elevated at intervals, through the medium of the cams 17, enga ing the disks 16 mounted on the spindle.

' ompression'springs for holding the valves to seat are designated 33. When the valves are forcibly elevated through the operation of the cams and springs 33 are laced under com ression, the springs 34 at't e lower end of t e spindles act to raise the valves from their seats, it being understood that the springs 33 are of greater strength.

The width of the rack is such that the gear wheelsengaging the rack are constantly in mesh therewith and a partial rotation is imparted to the spindles and valves when the latter are raised, so that the valves are reseated in a new position. The speed of the cam shaft isconsiderably lessthan that imparted by means of the crank.

l The spindle 11, is square in cross section where it engages disk 16, and is movable upwardly through the disk, so that the spindle may be raised to permit of the removal of the valve for the purpose of inspecting it and adding more compound.

What I claim is- Ina valve grinder, a spindle adapted for engagement with the valve to be ground, a disk carried by said spindle, a cam shaft, a

cam thereon for engaging the disk and rais-' square aper- 0 gear wheel. 1

In testimony whereof I afiix my signature.

CHARLES A. BUKOVE.

the spinwithout discontinuing the drive through the 

